问题: 我有一堆从组织下载的文件。在他们的数据目录中途,组织改变了命名约定(原因未知)。我希望创建一个脚本,将文件放在目录中,并以相同的方式重命名文件,但只是"回去一天"。
以下是一个文件名称的示例:org2015365_res_version.asc
我需要的是仅将年份(2015365
)更改为2015364
的逻辑。此逻辑需要跨越几年,因此2015001
将为2014365
。
我想我不确定这是否可行,因为它不适用于当前日期,因此使用像datetime
这样的模块似乎不适用。
我提出了部分逻辑。我知道它最多只是基本的,但是想要刺它。
# open all files
all_data = glob.glob('/somedir/org*.asc')
# empty array to be appended to
day = []
year = []
# loop through all files
for f in all_data:
# get first part of string, renders org2015365
f_split = f.split('_')[0]
# get only year day - renders 2015365
year_day = f_split.replace(f_split[:3], '')
# get only day - renders 365
days = year_day.replace(year_day[0:4], '')
# get only year - renders 2015
day.append(days)
years = year_day.replace(year_day[4:], '')
year.append(years)
# convert to int for easier processing
day = [int(i) for i in day]
year = [int(i) for i in year]
if day == 001 & year == 2016:
day = 365
year = 2015
elif day == 001 & year == 2015:
day = 365
year = 2014
else:
day = day - 1
除了上面的逻辑,我还从this帖子中看到了下面的函数,我不确定将它与上面的部分逻辑结合起来的最佳方法是什么。想法?
import glob
import os
def rename(dir, pattern, titlePattern):
for pathAndFilename in glob.iglob(os.path.join(dir, pattern)):
title, ext = os.path.splitext(os.path.basename(pathAndFilename))
os.rename(pathAndFilename,
os.path.join(dir, titlePattern % title + ext))
rename(r'c:\temp\xx', r'*.doc', r'new(%s)')
帮帮我,stackoverflow。你是我唯一的希望。
答案 0 :(得分:1)
您可以使用datetime模块:
#First argument - string like 2015365, second argument - format
dt = datetime.datetime.strptime(year_day,'%Y%j')
#Time shift
dt = dt + datetime.timedelta(days=-1)
#Year with shift
nyear = dt.year
#Day in year with shift
nday = dt.timetuple().tm_yday
答案 1 :(得分:0)
根据社区的反馈,我能够获得修复从组织下载的文件所需的逻辑!逻辑是最大的障碍。事实证明可以使用datetime
模块,我需要阅读更多内容。
我使用os
模块将逻辑与批量重命名相结合,我将下面的代码用于帮助可能有类似问题的未来用户!
# open all files
all_data = glob.glob('/some_dir/org*.asc')
# loop through
for f in all_data:
# get first part of string, renders org2015365
f_split = f.split('_')[1]
# get only year day - renders 2015365
year_day = f_split.replace(f_split[:10], '')
# first argument - string 2015365, second argument - format the string to datetime
dt = datetime.datetime.strptime(year_day, '%Y%j')
# create a threshold where version changes its naming convention
# only rename files greater than threshold
threshold = '2014336'
th = datetime.datetime.strptime(threshold, '%Y%j')
if dt > th:
# Time shift - go back one day
dt = dt + datetime.timedelta(days=-1)
# Year with shift
nyear = dt.year
# Day in year with shift
nday = dt.timetuple().tm_yday
# rename files correctly
f_output = 'org' + str(nyear) + str(nday).zfill(3) + '_res_version.asc'
os.rename(f, '/some_dir/' + f_output)
else:
pass